Vacuum cleaner



FIG. 1 is a top view of a vacuum cleaner showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a perspective view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a rear view thereof.

The broken line showing of the various regions of the vacuum is for environmental purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 